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Adsorption Characteristics of Pb2+ onto Wine Lees-Derived Biochar

TitleAdsorption Characteristics of Pb2+ onto Wine Lees-Derived Biochar
Publication TypeJournal Article
Year of Publication2016
AuthorsZhu, Qihong, Wu Jun, Wang Lilin, Yang Gang, and Zhang Xiaohong
JournalBulletin of Environmental Contamination and Toxicology
ISSN1432-0800
Abstract

Biochar has great advantages in soil amendment and polluted soil remediation. Herein, the pore and adsorption properties of wine lees-derived biochar were explored. Specifically, the adsorption isotherm and kinetics of Pb2+ onto wine lees-derived biochar were examined. Experimental results revealed that wine lees-derived biochar featured large specific surface area and total pore volume, and high contents of –COOH and –OH on its surface. Adsorption of Pb2+ onto wine lees-derived biochar proceeded via a multilayer adsorption mechanism, as described by the Freundlich adsorption model. Adsorption kinetics followed the Lagergren pseudo-second-order kinetics model; adsorption equilibrium was achieved within 30–60 min. Furthermore, the effect of solution pH on the adsorption of Pb2+ was investigated. Within the studied pH range of 3–6, the adsorption capacity increased with increasing pH. Under established optimized conditions, wine lees-derived biochar achieved a Pb2+ adsorption capacity of 79.12 mg/g.

URLhttp://link.springer.com/article/10.1007/s00128-016-1760-4
DOI10.1007/s00128-016-1760-4
Short TitleBull Environ Contam Toxicol